21112210100011 has 4 divisors (see below), whose sum is σ = 21427317713512. Its totient is φ = 20797102486512.

The previous prime is 21112210099979. The next prime is 21112210100057. The reversal of 21112210100011 is 11000101221112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112210100011 - 2⁵ = 21112210099979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112210099964 and 21112210100000.

It is not an unprimeable number, because it can be changed into a prime (21112210160011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157553806650 + ... + 157553806783.

It is an arithmetic number, because the mean of its divisors is an integer number (5356829428378).

Almost surely, 2^{21112210100011} is an apocalyptic number.

21112210100011 is a deficient number, since it is larger than the sum of its proper divisors (315107613501).

21112210100011 is an equidigital number, since it uses as much as digits as its factorization.

21112210100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315107613500.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21112210100011 its reverse (11000101221112), we get a palindrome (32112311321123).

The spelling of 21112210100011 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, one hundred thousand, eleven".